* {
    margin: 0;
    padding: 0;
}
.father {
    position: relative;
    width: 450px;
    height: 300px;
    overflow: hidden;
    margin:50px auto;
}
.img {
    position: absolute;
    top: 0;
    left: 0;
    width: 800%;
    /* border: 2px solid red; */
}
li {
    float: left;
    list-style-type: none;
}
.img li img {
    width: 450px;
    height: 300px;
}
.left {
    position: absolute;
    top: 150px;
    left: 0;
    width: 20px;
    height: 20px;
    color: white;
    background-color: black;
    opacity: 0.5;
    border-radius: 0 100% 100% 0;
    text-align: center;
    line-height: 20px;
    cursor: default;
    /* display: none; */
}
.right {
    width: 20px;
    height: 20px;
    position: absolute;
    top: 150px;
    right: 0px;
    color: white;
    background-color: black;
    opacity: 0.5;
    border-radius: 100% 0 0 100%;
    text-align: center;
    line-height: 20px;
    cursor: default;
    /* display: none; */
    /* z-index: 99999; */
}
.spot {
    position: absolute;
    top: 250px;
    left: 175px;
    width: 100px;
    height: 10px;
    border-radius: 10px;
}
.spot li {
    float: left;
    width: 10px;
    height: 10px;
    border: 1px solid white;
    list-style-type: none;
    margin-left: 12px;
    border-radius: 100%;
}
.current {
    background-color: #fff;
}